Order Flow Support and Resistance

While horizontal S&R lines are often used to study price, they really can be used on anything, and sometimes it offers compelling views of the market to look at support on significant indicators like cumulative delta information. Here you can see that today's intraday decline was known well in advance with the net order flow dipped for the first time in several hours. This was a major leading indicator that preceded a nice short trade in the ES.

Interesting study of total accumulated order flow

Cumulative Delta, all trades, today